基于有限元/边界元的双层周期加筋板声辐射分析

Acoustic radiation analysis of double periodical beam-stiffened panels based on FEM/BEM

采用有限元和边界元相结合的方法研究了水中双层周期加筋板结构在简谐力作用下的声辐射特性。给出了有限元方程,详细推导了边界元方程,利用有限元和间接边界元的声振耦合方程,计算了在谐力作用下结构表面振动的辐射声场,从而为揭示双层周期加筋板结构声学特性提供了一种数值方法。该数值方法可用于任意复杂结构在流体介质中的振动和声学分析。

Acoustic radiation charcteristics of the double periodical beam-stiffened panels in water excited by a harmonic point force is investigated analytically. The numerical method which coupled FEM/BEM equation for computing both structure vibration and the corresponding acoustic radiation is provided to reveal acoustic characteristic of the double periodical beam-stiffened panels. This method can be applied to the vibration and sound analysis for random complex body in fluids.